#!/usr/bin/env python3
# -*- coding:utf-8 -*-
import requests
import re

headers = {
'User-Agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2743.116 Safari/537.36'
}

r = requests.get('https://www.zhihu.com/explore', headers=headers)

pattern = re.compile('explore-feed.*?question_link.*?>(.*?)</a>', re.S)
titles = re.findall(pattern, r.text)
print(titles)